Preliminary Study On Comprehensive Benefit Evaluation of Lawn Irrigation Project In Tibet Alpine Pasturing Area

Lawn irrigation is an important means to promote economic development and protect the grassland ecology in pasturing area.So,the correct evaluation of its efficiency is beneficial for promoting the sustainable and healthy development of lawn irrigation in pasturing area.In this paper,according to the weak link of benefit evaluation of lawn irrigation project in Tibet alpine pasturing area,the DangXiong county of Lhasa city is taken as the studying object and the analytic hierarchy process is applied to proceed initial quantitative evaluation of its comprehensive benefit from the aspects of ecology,economic and social benefit.The results show that when the 8873hm2 lawn irrigation project will be finished in 2020 in Dangxiong County,the comprehensive benefit will reach to 60.29,which is larger than that in present situation by 18.91.And every index can overall reflect the comprehensive benefit of lawn irrigation in alpine pasturing area.DangXiong case study shows that the comprehensive benefit of lawn irrigation project is significantly increased and this method has wide popularizing prospect in alpine pasturing region.